DTC Troubleshooting: P0451
DTC P0451: FTP Sensor Circuit Range/Performance Problem
NOTE:
Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
If DTC P2422 is stored at the same time as DTC P0451, troubleshoot DTC P2422 first, then recheck for DTC P0451.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0451 FTP Sensor Circuit Range/Performance Problem
      

1.
Problem verification:

Problem verification
?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Start the engine, and let it idle for 1 minute.

?4.
Monitor the OBD STATUS for DTC P0451 in the DTCs MENU with the HDS.
DTC Description
OBD STATUS
P0451 FTP Sensor Circuit Range/Performance Problem
  

Does the HDS indicate FAILED?

     
YES
     
     
     
     
NO
     
     
     
If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor and the PCM. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.
Repair verification (OBD STATUS check):

?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Reset the PCM with the HDS.


?3.
Do the PCM idle learn procedure.

?4.
Start the engine, and let it idle for 1 minute.

?5.
Monitor the OBD STATUS for DTC P0451 in the DTCs MENU with the HDS.
DTC Description
OBD STATUS
P0451 FTP Sensor Circuit Range/Performance Problem
  


Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?

     
PASSED
     
     
     
Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated, go to the indicated DTC's troubleshooting.?
     
FAILED
     
     
     
Go to step 1 and recheck.
     
NOT COMPLETED
     
     
     
Meet the test condition, and check the OBD STATUS again.